Sum Frequency Generation

Differential-Frequency Generation

Optical Parametric Generation

Phase Matching

Conversion Efficiency

Angle Tilting

Optimum Crystal Cut

Crystal Size

Brewster's angle

Handle A NLO Crystal

 

 

Differential-Frequency Generation (DFG)

w1 - w2 = w3 (or 1/l1 -1/l2 = 1/l3 in wavelength)

It mixs one high energy photon and one low energy photon into another low energy photon.

For example:

532 nm - 810 nm ----> 1550 nm
 
Differential Frequency Generation

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